Name:	fbp_ChangesInAllowanceForLoanLosses
Namespace Prefix:	fbp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The aggregate amount of non-performing assets sold during the period. The amount includes loans as well as other real estate owned.

No definition available.

Name:	fbp_ClassifiedAndNonperformingAssetsSold
Namespace Prefix:	fbp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Loans reclassified during period to more accurately depict the nature of the underlying loans.

No definition available.

Name:	fbp_ReclassificationOfLoans
Namespace Prefix:	fbp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Reserve for unfunded loan commitments.

No definition available.

Name:	fbp_ReserveForUnfundedLoanCommitments
Namespace Prefix:	fbp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of direct net write-downs of financing receivables charged against the allowance related to assets sold.

No definition available.

Name:	fbp_WriteOffsLoansSold
Namespace Prefix:	fbp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of direct net write-downs of financing receivables charged against the allowance related to credit losses.

No definition available.